Ski boot



FIG. 1 is a left side elevation view of ski boot, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a front end elevation view thereof; and,

FIG. 5 is a rear end elevation view thereof.

The broken lines in the figures are for illustrative purposes only and form no part of the claimed design. The bottom of the design, not shown, forms no part of the claimed design. 

We claim the ornamental design for ski boot, as shown and described. 